126 lines
3.6 KiB
Lua
126 lines
3.6 KiB
Lua
-- Interlocking counterpart of LZB, which has been moved into the core...
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-- Registers LZB callback for signal management.
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--[[
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usage of lzbdata:
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{
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travsht = boolean indicating whether the train will be a shunt move at "trav"
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travspd = speed restriction at end of traverser
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travwspd = warning speed res.t
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}
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]]
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local SHUNT_SPEED_MAX = advtrains.SHUNT_SPEED_MAX
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local il = advtrains.interlocking
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local function get_over_function(speed, shunt)
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return function(pos, id, train, index, speed, lzbdata)
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if speed == 0 and minetest.settings:get_bool("at_il_force_lzb_halt") then
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atwarn(id,"overrun LZB 0 restriction (red signal) ",pos)
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-- Set train 1 index backward. Hope this does not lead to bugs...
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--train.index = index - 0.5
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train.speed_restriction = 0
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--TODO temporary
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--advtrains.drb_dump(id)
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--error("Debug: "..id.." triggered LZB-0")
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else
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train.speed_restriction = speed
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train.is_shunt = shunt
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end
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--atdebug("train drove over IP: speed=",speed,"shunt=",shunt)
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end
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end
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advtrains.tnc_register_on_approach(function(pos, id, train, index, has_entered, lzbdata)
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--atdebug(id,"IL ApprC",pos,index,lzbdata)
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--train.debug = advtrains.print_concat_table({train.is_shunt,"|",index,"|",lzbdata})
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local pts = advtrains.roundfloorpts(pos)
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local cn = train.path_cn[index]
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local travsht = lzbdata.il_shunt
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local travspd = lzbdata.il_speed
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if travsht==nil then
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-- lzbdata has reset
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travspd = train.speed_restriction
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travsht = train.is_shunt or false
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end
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-- check for signal
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local asp, spos = il.db.get_ip_signal_asp(pts, cn)
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-- do ARS if needed
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local ars_enabled = not train.ars_disable
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-- Note on ars_disable:
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-- Theoretically, the ars_disable flag would need to behave like the speed restriction field: it should be
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-- stored in lzbdata and updated once the train drives over. However, for the sake of simplicity, it is simply
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-- a value in the train. In this case, this is sufficient because once a train triggers ARS for the first time,
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-- resetting the path does not matter to the set route and ARS doesn't need to be called again.
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if spos and ars_enabled then
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--atdebug(id,"IL Spos (ARS)",spos,asp)
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local sigd = il.db.get_sigd_for_signal(spos)
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if sigd then
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il.ars_check(sigd, train)
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end
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end
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--atdebug("trav: ",pos, cn, asp, spos, "travsht=", lzb.travsht)
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local lspd
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if asp then
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--atdebug(id,"IL Signal",spos, asp, lzbdata, "trainstate", train.speed_restriction, train.is_shunt)
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local nspd = 0
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--interpreting aspect and determining speed to proceed
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if travsht then
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--shunt move
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if asp.shunt then
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nspd = SHUNT_SPEED_MAX
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elseif asp.proceed_as_main and asp.main ~= 0 then
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nspd = asp.main
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travsht = false
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end
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else
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--train move
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if asp.main ~= 0 then
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nspd = asp.main
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elseif asp.shunt then
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nspd = SHUNT_SPEED_MAX
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travsht = true
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end
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end
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-- nspd can now be: 1. !=0: new speed restriction, 2. =0: stop here or 3. nil: keep travspd
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if nspd then
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if nspd == -1 then
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travspd = nil
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else
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travspd = nspd
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end
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end
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--atdebug("ns,ts", nspd, travspd)
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lspd = travspd
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local udata = {signal_pos = spos}
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local callback = get_over_function(lspd, travsht)
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lzbdata.il_shunt = travsht
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lzbdata.il_speed = travspd
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--atdebug("new lzbdata",lzbdata)
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advtrains.lzb_add_checkpoint(train, index, lspd, callback, lzbdata, udata)
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end
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end)
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-- Set the ars_disable flag to the value passed
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-- Triggers a path invalidation if set to false
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function advtrains.interlocking.ars_set_disable(train, value)
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if value then
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train.ars_disable = true
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else
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train.ars_disable = nil
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minetest.after(0, advtrains.path_invalidate, train)
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end
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end
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